What is the weather in Grantsburg right now?

Current weather in Grantsburg is light rain.

Where can I find the hourly weather forecast for Grantsburg?

This page shows hourly weather forecast for Grantsburg, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Grantsburg updated regularly?

Weather data for Grantsburg is updated regularly with the latest available observations and forecasts.

Now · 3:53 PM

Grantsburg Weather & Hourly Forecast

United States · Wisconsin · 54840

56°F

Light rain

Feels like: 48°F

💧 Humidity 93% 🌡 Pressure 29.83 inHg 💨 Wind 15 mph 👁 Visibility 1.3 mi ☁ Clouds 100% ☀️ UV index 0.2 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Grantsburg

Today

4:00 PM

Light rain

56° 💧 0.351 in 💨 15 mph H 93%29.83 inHg

7:00 PM

Light rain

56° 💧 0.043 in 💨 14 mph H 97%29.77 inHg

10:00 PM

Light rain

59° 💧 0.007 in 💨 12 mph H 98%29.74 inHg

Tomorrow

1:00 AM

Clear night

61° 💧 0.001 in 💨 9 mph H 99%29.71 inHg

4:00 AM

Mostly clear night

61° 💧 None 💨 9 mph H 98%29.74 inHg

7:00 AM

Sunny

57° 💧 None 💨 14 mph H 90%29.83 inHg

10:00 AM

Sunny

62° 💧 None 💨 14 mph H 61%29.94 inHg

1:00 PM

Sunny

67° 💧 None 💨 13 mph H 52%30.00 inHg

4:00 PM

Sunny

68° 💧 None 💨 10 mph H 50%30.06 inHg

7:00 PM

Sunny

62° 💧 None 💨 5 mph H 65%30.12 inHg

10:00 PM

Clear night

55° 💧 None 💨 3 mph H 80%30.21 inHg

Wednesday

1:00 AM

Clear night

52° 💧 None 💨 1 mph H 89%30.27 inHg

4:00 AM

Mostly clear night

48° 💧 None 💨 2 mph H 96%30.30 inHg

7:00 AM

Fog

47° 💧 None 💨 3 mph H 98%30.36 inHg

10:00 AM

Sunny

62° 💧 None 💨 5 mph H 71%30.36 inHg

1:00 PM

Overcast

69° 💧 None 💨 5 mph H 50%30.33 inHg

Today

4:00 PM

Light rain

56° 💧 0.073 in 💨 15 mph H 93%29.83 inHg

5:00 PM

Moderate rain

55° 💧 0.204 in 💨 13 mph H 94%29.80 inHg

6:00 PM

Light rain

56° 💧 0.074 in 💨 13 mph H 96%29.80 inHg

7:00 PM

Light rain

56° 💧 0.021 in 💨 14 mph H 97%29.77 inHg

8:00 PM

Light rain

57° 💧 0.011 in 💨 13 mph H 97%29.74 inHg

9:00 PM

Light rain

58° 💧 0.011 in 💨 13 mph H 97%29.74 inHg

10:00 PM

Light rain

59° 💧 0.004 in 💨 12 mph H 98%29.74 inHg

11:00 PM

Overcast night

61° 💧 0.002 in 💨 11 mph H 98%29.74 inHg

Tomorrow

12:00 AM

Mostly cloudy night

61° 💧 0.001 in 💨 10 mph H 98%29.74 inHg

1:00 AM

Clear night

61° 💧 0.001 in 💨 9 mph H 99%29.71 inHg

2:00 AM

Clear night

61° 💧 None 💨 8 mph H 99%29.71 inHg

3:00 AM

Clear night

61° 💧 None 💨 9 mph H 99%29.74 inHg

4:00 AM

Mostly clear night

61° 💧 None 💨 9 mph H 98%29.74 inHg

5:00 AM

Mostly clear night

59° 💧 None 💨 10 mph H 98%29.77 inHg

6:00 AM

Clear night

59° 💧 None 💨 13 mph H 95%29.77 inHg

7:00 AM

Sunny

57° 💧 None 💨 14 mph H 90%29.83 inHg

8:00 AM

Sunny

57° 💧 None 💨 13 mph H 77%29.88 inHg

9:00 AM

Sunny

59° 💧 None 💨 12 mph H 67%29.91 inHg

10:00 AM

Sunny

62° 💧 None 💨 14 mph H 61%29.94 inHg

11:00 AM

Sunny

64° 💧 None 💨 15 mph H 55%29.97 inHg

12:00 PM

Mostly sunny

66° 💧 None 💨 14 mph H 52%30.00 inHg

1:00 PM

Sunny

67° 💧 None 💨 13 mph H 52%30.00 inHg

2:00 PM

Sunny

67° 💧 None 💨 12 mph H 52%30.03 inHg

3:00 PM

Sunny

67° 💧 None 💨 11 mph H 51%30.03 inHg

4:00 PM

Sunny

68° 💧 None 💨 10 mph H 50%30.06 inHg

5:00 PM

Sunny

67° 💧 None 💨 9 mph H 50%30.09 inHg

6:00 PM

Sunny

66° 💧 None 💨 8 mph H 55%30.09 inHg

7:00 PM

Sunny

62° 💧 None 💨 5 mph H 65%30.12 inHg

8:00 PM

Clear night

59° 💧 None 💨 5 mph H 71%30.15 inHg

9:00 PM

Clear night

57° 💧 None 💨 4 mph H 76%30.18 inHg

10:00 PM

Clear night

55° 💧 None 💨 3 mph H 80%30.21 inHg

11:00 PM

Clear night

53° 💧 None 💨 2 mph H 84%30.24 inHg

Wednesday

12:00 AM

Clear night

53° 💧 None 💨 1 mph H 86%30.24 inHg

1:00 AM

Clear night

52° 💧 None 💨 1 mph H 89%30.27 inHg

2:00 AM

Clear night

51° 💧 None 💨 0 mph H 91%30.30 inHg

3:00 AM

Clear night

50° 💧 None 💨 1 mph H 94%30.30 inHg

4:00 AM

Mostly clear night

48° 💧 None 💨 2 mph H 96%30.30 inHg

5:00 AM

Clear night

48° 💧 None 💨 2 mph H 97%30.30 inHg

6:00 AM

Fog at night

47° 💧 None 💨 3 mph H 98%30.33 inHg

7:00 AM

Fog

47° 💧 None 💨 3 mph H 98%30.36 inHg

8:00 AM

Fog

51° 💧 None 💨 5 mph H 95%30.36 inHg

9:00 AM

Mostly sunny

56° 💧 None 💨 4 mph H 86%30.36 inHg

10:00 AM

Sunny

62° 💧 None 💨 5 mph H 71%30.36 inHg

11:00 AM

Partly cloudy

66° 💧 None 💨 5 mph H 59%30.36 inHg

12:00 PM

Overcast

68° 💧 None 💨 5 mph H 52%30.36 inHg

1:00 PM

Overcast

69° 💧 None 💨 5 mph H 50%30.33 inHg

2:00 PM

Overcast

69° 💧 None 💨 4 mph H 51%30.30 inHg

3:00 PM

Overcast

68° 💧 None 💨 3 mph H 52%30.30 inHg

4:00 PM

Overcast

69° 💧 None 💨 4 mph H 51%30.27 inHg

5:00 PM

Overcast

68° 💧 None 💨 4 mph H 54%30.27 inHg

6:00 PM

Light rain

65° 💧 0.009 in 💨 5 mph H 72%30.27 inHg

7:00 PM

Light rain

63° 💧 0.009 in 💨 7 mph H 77%30.24 inHg

8:00 PM

Overcast night

62° 💧 None 💨 6 mph H 78%30.21 inHg

9:00 PM

Overcast night

60° 💧 None 💨 6 mph H 80%30.24 inHg

10:00 PM

Mostly cloudy night

58° 💧 None 💨 5 mph H 86%30.27 inHg

11:00 PM

Mostly cloudy night

57° 💧 None 💨 4 mph H 89%30.27 inHg

Thursday

12:00 AM

Mostly cloudy night

56° 💧 None 💨 5 mph H 91%30.27 inHg

1:00 AM

Mostly clear night

56° 💧 None 💨 5 mph H 92%30.24 inHg

2:00 AM

Mostly clear night

54° 💧 None 💨 5 mph H 96%30.24 inHg

3:00 AM

Mostly clear night

53° 💧 None 💨 5 mph H 97%30.24 inHg

4:00 AM

Clear night

52° 💧 None 💨 5 mph H 98%30.24 inHg

5:00 AM

Clear night

52° 💧 None 💨 5 mph H 98%30.27 inHg

6:00 AM

Clear night

51° 💧 None 💨 5 mph H 98%30.27 inHg

7:00 AM

Sunny

51° 💧 None 💨 4 mph H 99%30.27 inHg

10:00 AM

Mostly sunny

63° 💧 None 💨 2 mph H 80%30.30 inHg

1:00 PM

Mostly sunny

72° 💧 None 💨 3 mph H 52%30.30 inHg

4:00 PM

Mostly cloudy

73° 💧 None 💨 2 mph H 48%30.24 inHg

7:00 PM

Partly cloudy

66° 💧 None 💨 2 mph H 72%30.24 inHg

10:00 PM

Overcast night

60° 💧 None 💨 4 mph H 87%30.27 inHg

Friday

1:00 AM

Overcast night

59° 💧 None 💨 5 mph H 81%30.30 inHg

4:00 AM

Overcast night

57° 💧 None 💨 7 mph H 86%30.27 inHg

7:00 AM

Overcast

57° 💧 None 💨 7 mph H 80%30.27 inHg

10:00 AM

Overcast

63° 💧 None 💨 6 mph H 73%30.27 inHg

1:00 PM

Moderate rain

60° 💧 None 💨 11 mph H 96%30.21 inHg

4:00 PM

Moderate rain

60° 💧 None 💨 8 mph H 96%30.12 inHg

7:00 PM

Heavy rain

60° 💧 None 💨 12 mph H 97%30.03 inHg

10:00 PM

Moderate rain

61° 💧 None 💨 13 mph H 97%29.97 inHg

Saturday

1:00 AM

Light rain

58° 💧 None 💨 16 mph H 97%29.91 inHg

4:00 AM

Overcast night

58° 💧 None 💨 11 mph H 95%29.83 inHg

7:00 AM

Overcast

59° 💧 None 💨 6 mph H 97%29.80 inHg

10:00 AM

Overcast

62° 💧 None 💨 6 mph H 94%29.80 inHg

1:00 PM

Overcast

66° 💧 None 💨 2 mph H 87%29.80 inHg

4:00 PM

Overcast

67° 💧 None 💨 7 mph H 84%29.80 inHg

7:00 PM

Overcast

65° 💧 None 💨 6 mph H 87%29.83 inHg

10:00 PM

Overcast night

64° 💧 None 💨 6 mph H 86%29.85 inHg

Sunday

1:00 AM

Mostly cloudy night

62° 💧 None 💨 5 mph H 92%29.88 inHg

4:00 AM

Overcast night

61° 💧 None 💨 7 mph H 90%29.94 inHg

7:00 AM

Overcast

60° 💧 None 💨 9 mph H 88%29.97 inHg

1:00 PM

Overcast

64° 💧 None 💨 11 mph H 74%30.09 inHg

7:00 PM

Sunny

63° 💧 None 💨 7 mph H 71%30.12 inHg

Monday

1:00 AM

Clear night

52° 💧 None 💨 6 mph H 95%30.21 inHg

7:00 AM

Sunny

49° 💧 None 💨 5 mph H 98%30.24 inHg

1:00 PM

Sunny

67° 💧 None 💨 5 mph H 54%30.24 inHg

7:00 PM

Sunny

62° 💧 None 💨 1 mph H 72%30.21 inHg

Tuesday

1:00 AM

Clear night

52° 💧 None 💨 4 mph H 90%30.27 inHg

7:00 AM

Sunny

49° 💧 None 💨 2 mph H 94%30.33 inHg

1:00 PM

Sunny

69° 💧 None 💨 5 mph H 55%30.33 inHg

7:00 PM

Sunny

62° 💧 None 💨 5 mph H 78%30.27 inHg

Wednesday

1:00 AM

Clear night

54° 💧 None 💨 6 mph H 90%30.33 inHg

7:00 AM

Sunny

50° 💧 None 💨 6 mph H 95%30.39 inHg

1:00 PM

Mostly sunny

68° 💧 None 💨 8 mph H 57%30.36 inHg

7:00 PM

Sunny

61° 💧 None 💨 6 mph H 72%30.27 inHg

Thursday

1:00 AM

Clear night

56° 💧 None 💨 9 mph H 78%30.30 inHg

7:00 AM

Overcast

52° 💧 None 💨 7 mph H 92%30.30 inHg

1:00 PM

Mostly cloudy

66° 💧 None 💨 8 mph H 72%30.27 inHg

7:00 PM

Mostly cloudy

65° 💧 None 💨 6 mph H 79%30.21 inHg

Friday

1:00 AM

Mostly cloudy night

62° 💧 None 💨 8 mph H 95%30.21 inHg

7:00 AM

Light rain

61° 💧 None 💨 7 mph H 98%30.21 inHg

1:00 PM

Mostly cloudy

72° 💧 None 💨 8 mph H 73%30.18 inHg

7:00 PM

Overcast

70° 💧 None 💨 5 mph H 85%30.12 inHg

Saturday

1:00 AM

Overcast night

67° 💧 None 💨 6 mph H 91%30.12 inHg

7:00 AM

Partly cloudy night

63° 💧 None 💨 5 mph H 99%30.12 inHg

1:00 PM

Mostly cloudy

77° 💧 None 💨 8 mph H 63%30.06 inHg

7:00 PM

Partly cloudy

68° 💧 None 💨 6 mph H 98%29.97 inHg

Sunday

1:00 AM

Moderate rain

66° 💧 None 💨 11 mph H 98%29.91 inHg

7:00 AM

Light rain

66° 💧 None 💨 12 mph H 98%29.80 inHg

1:00 PM

Light rain

71° 💧 None 💨 10 mph H 84%29.74 inHg

7:00 PM

Moderate rain

65° 💧 None 💨 4 mph H 98%29.68 inHg

Monday

1:00 AM

Mostly clear night

62° 💧 None 💨 4 mph H 99%29.71 inHg

7:00 AM

Overcast night

61° 💧 None 💨 4 mph H 100%29.80 inHg

1:00 PM

Mostly sunny

74° 💧 None 💨 5 mph H 71%29.83 inHg

7:00 PM

Clear night

69° 💧 None 💨 5 mph H 86%29.83 inHg

Tuesday

1:00 AM

Clear night

63° 💧 None 💨 6 mph H 96%29.85 inHg

7:00 AM

Clear night

62° 💧 None 💨 6 mph H 98%29.91 inHg

In Grantsburg and, more broadly, across the state of Wisconsin: As the afternoon progresses into the evening, mostly cloudy skies will persist with temperatures remaining mild between 57 and 65 degrees Fahrenheit. A slight chance of rain exists, with possible accumulation around 0.03 inches, primarily during the evening hours. Winds will continue from the south at speeds up to 18 mph, with gusts reaching 44 mph, potentially causing some breezy conditions. Overall, expect a calm but cloudy evening with mild temperatures and a small likelihood of light rain.

15-Day Weather Outlook for Grantsburg

TomorrowTomorrow

Mostly cloudy 68°/53° 💧 None 💨 15 mph

Wednesday, Sep 16Wed Sep 16

Mostly sunny 69°/47° 💧 None 💨 7 mph

Thursday, Sep 17Thu Sep 17

Mostly cloudy 73°/51° 💧 0.469 in 💨 5 mph

Friday, Sep 18Fri Sep 18

Heavy rain 63°/57° 💧 1.745 in 💨 13 mph

Saturday, Sep 19Sat Sep 19

Light rain 67°/58° 💧 0.415 in 💨 16 mph

Sunday, Sep 20Sun Sep 20

Overcast 64°/60° 💧 0.004 in 💨 11 mph

Monday, Sep 21Mon Sep 21

Sunny 67°/49° 💧 None 💨 6 mph

Tuesday, Sep 22Tue Sep 22

Sunny 69°/49° 💧 None 💨 5 mph

Wednesday, Sep 23Wed Sep 23

Mostly sunny 68°/50° 💧 None 💨 8 mph

Thursday, Sep 24Thu Sep 24

Overcast 66°/52° 💧 0.001 in 💨 9 mph

Friday, Sep 25Fri Sep 25

Light rain 72°/61° 💧 0.082 in 💨 8 mph

Saturday, Sep 26Sat Sep 26

Partly cloudy 77°/63° 💧 0.254 in 💨 8 mph

Sunday, Sep 27Sun Sep 27

Moderate rain 71°/65° 💧 0.815 in 💨 12 mph

Monday, Sep 28Mon Sep 28

Mostly sunny 74°/61° 💧 0.067 in 💨 5 mph

Tuesday, Sep 29Tue Sep 29

Sunny 63°/62° 💧 None 💨 6 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Grantsburg

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Grantsburg

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 4:00 PM

PM2.5 Fine particles Good 1,3µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 1,4µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Fair 66,7µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 1,9µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in Grantsburg

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 1,7Low 🙂Fair

Tomorrow UV 4,5Moderate 🙂Fair

Wednesday UV 4,1Moderate 🙂Fair

Thursday UV 6,0High 😐Moderate

Friday UV 5,0Moderate 🙂Fair

Saturday UV 4,0Moderate —Unavailable

Sunday UV 5,0Moderate —Unavailable

Hourly UV index today

4:00 PMUV 0,2 5:00 PMUV 0,1 6:00 PMUV 0,1 7:00 PMUV 0,0

Today's weather health advice Open today's recommendations.

Low UV risk

UV radiation will be low, although basic protection is still advisable during prolonged exposure.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Grantsburg

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · GRANTSBURG, WISCONSIN

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 2:00 AM–3:00 AM.

94/100Best-hour score

BEST TIME TONIGHT 2:00 AM–3:00 AM Astronomical darkness: 9:06 PM–5:07 AM

☁ Cloud cover 0% Real hourly forecast for the best viewing hour.

☾ Moonlight 13% Waxing Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 59° high at the best hour.

✦ Estimated visible meteors 1–4/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min74%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

DISCOVER WEATHER NEARBY Weather in other cities

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Forecast data for Grantsburg were last refreshed today at 3:53 PM. The current forecast period extends through 16/09/2026 at 1:00 PM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.